Chapter 3 Definitions Flashcards
Electroencephalogram
The recordings of the electrical activity in the brain - recorded by a computer and shown on a monitor.
NREM Sleep
One of two phases of sleep, characterised by little or no rapid eye movement, and is divided into 4 stages of NREM sleep that are determined predominantly but he predominant brainwave patterns.
REM Sleep
On of two phases of sleep, characterised by rapid eye movement.
Amplitude
In terms of brainwaves, the height of the peaks and troughs of the curved graph that represents brainwave activity.
Frequency
In terms of brainwaves, the number of brainwaves per second.
Describe the frequency and amplitude of each type of brainwave
Beta waves - high F, low A
Alpha waves - reasonably high F, low A
Theta waves - medium F, mixed A (some high, some low)
Delta waves - steady pattern of low F, high A
Sleep spindle
Brainwave patterns that consist of high bursts of frequency.
STAGE 2 NREM (can also be found in 3-4 but mainly 2).
K-complexes
Brainwave patterns that consist of a sharp rise and fall in amplitude, lasting about two seconds in the EEG.
STAGE 2 NREM (can be triggered by external stimuli such as a loud bang).
Sawtooth waves
Special type of theta-like brainwave pattern that resembles the blade of a saw that may be found amongst the random and fast beta-like waves, especially when there is a burst of rapid eye movement.
REM SLEEP
Electrooculargraph (EOG)
A device that detects, amplifies and records electrical activity in the muscles that move the eye.
Electrooculargram
The recordings of the electrical activity in the muscles that allow the eye to move.
Electromyograph (EMG)
A device that detects, amplifies and records the electrical activity of muscles.
Electromyogram
The recordings of the electrical activity of muscles.
Polysomnogram
A continuously moving chart that displays data collected simultaneously from EEG, EOG, EMG and any other devices.
Electrocardiograph (EOG)
A device that detects, amplifies and records the electrical activity of the heart muscles.
Galvanic Skin Response (GSR)
The physiological response that indicates the electrical conductivity of the skin.
Sleep laboratory
A place used for scientific research on sleep that resembles a bedroom.
Self-reports
Statements and answers to questions made by the participants concerning their psychological experience (thoughts, feelings and behaviours) in relation to a psychological phenomena, in this case, SLEEP.
Video monitoring
Common method used to observe sleep - uses infrared cameras that operate silently to allow footage to be seen and taped in the dark without disturbing the sleeping participant.
Electroencephalograph (EEG)
A device that detects, amplifies and records electrical activity in the brain in the form of brainwaves.
